On-screen keyboard

Abstract

An on-screen keyboard for a cellular phone. The on-screen keyboard includes a backlight module, a first transparent insulation film, a second transparent insulation film, a third transparent insulation film and a transparent film. The backlight module has a light-guiding plate and a light-emitting diode. The upper surface of the light-guiding plate is printed with numerals and figures. The first transparent insulation film is disposed on the backlight module. The upper surface of the first transparent insulation film is printed with transparent circuits. The second transparent insulation film is disposed on the first transparent insulation film and formed with multiple through holes. The third transparent insulation film is disposed on the second transparent insulation film. The lower surface of the third transparent insulation film is printed with multiple transparent conductive portions. The transparent film is disposed on the third transparent insulation film and has a picture thereon.

What is claimed is:  
     
         1 . An on-screen keyboard for a cellular phone, comprising: 
 a backlight module having a light-guiding plate and a light-emitting diode, the light-emitting diode disposed laterally to the light-guiding plate, wherein the upper surface of the light-guiding plate is printed with numerals and figures while the lower surface is reflective;    a first transparent insulation film disposed on the backlight module, wherein the upper surface of the first transparent insulation film is printed with transparent circuits;    a second transparent insulation film disposed on the first transparent insulation film and including a plurality of through parts;    a third transparent insulation film disposed on the second transparent insulation film, the lower surface of the third transparent insulation film printed with a plurality of transparent conductive portions, wherein the transparent conductive portions correspond to the through parts of the second transparent insulation film and the numerals and the figures on the upper surface of the light-guiding plate; and    a transparent film disposed on the third transparent insulation film.    
     
     
         2 . The on-screen keyboard as claimed in  claim 1 , wherein the transparent film includes a picture.  
     
     
         3 . The on-screen keyboard as claimed in  claim 2 , wherein the picture is rendered in pervious ink.  
     
     
         4 . The on-screen keyboard as claimed in  claim 1 , wherein the reflective surface of the light-guiding plate further comprises a plurality of reflective protrusions.  
     
     
         5 . The on-screen keyboard as claimed in  claim 1 , wherein the first transparent insulation film is a polyester film.  
     
     
         6 . The on-screen keyboard as claimed in  claim 1 , wherein the second transparent insulation film is a polyester film.  
     
     
         7 . The on-screen keyboard as claimed in  claim 1 , wherein the third transparent insulation film is a polyester film.  
     
     
         8 . The on-screen keyboard as claimed in  claim 1 , wherein the transparent film is a polyester film.  
     
     
         9 . The on-screen keyboard as claimed in  claim 1 , wherein the transparent circuits and the transparent conductive portions are indium-tin oxides (ITO).  
     
     
         10 . An on-screen keyboard for a cellular phone, comprising: 
 a backlight module including a light-guiding plate and a light-emitting diode, the light-emitting diode disposed laterally to the light-guiding plate, and a first surface of the light-guiding plate printed with numerals and figures and a second surface of the light-guiding plate is reflective;    a printed transparent film disposed on the backlight module, the printed transparent film printed with transparent circuits; and    a corresponding transparent film disposed on the printed transparent film, the corresponding transparent film printed with a plurality of transparent conductive portions, wherein the transparent conductive portions correspond to the numerals and the figures on the first surface of the light-guiding plate.    
     
     
         11 . The on-screen keyboard as claimed in  claim 10 , wherein the second surface of the light-guiding plate further comprises a plurality of reflective protrusions.  
     
     
         12 . The on-screen keyboard as claimed in  claim 10 , wherein the printed transparent film is a polyester film.  
     
     
         13 . The on-screen keyboard as claimed in  claim 1 , wherein the corresponding transparent film is a polyester film.  
     
     
         14 . The on-screen keyboard as claimed in  claim 1 , wherein the transparent circuits and the transparent conductive portions are indium-tin oxides (ITO).